refactor(navigation): simplify main tab labels

app/gui/main_window.py

@@ -100,7 +100,7 @@ class MainWindow(QMainWindow):
         self.setWindowTitle(display_name())
         _fit_and_center_window(self)
         self.setStyleSheet(BUTTON_BASE_STYLE)
-        self._settings_tab_index = TAB_TITLES.index("⑤ 设置")
+        self._settings_tab_index = TAB_TITLES.index("设置")
         self._last_tab_index = 0
         self._reverting_tab_change = False
         self.tabs = QTabWidget()
@@ -109,7 +109,6 @@ class MainWindow(QMainWindow):
         self.tabs.currentChanged.connect(self._on_tab_changed)
         for title in TAB_TITLES:
             self.tabs.addTab(self._build_tab(title), title)
-        self.tabs.setTabIcon(TAB_TITLES.index("③ 更新蝦皮"), _warning_dot_icon())
         self.setCentralWidget(self.tabs)
         self.show_status("就绪", level="muted")
         if startup_status:
@@ -153,20 +152,20 @@ class MainWindow(QMainWindow):
                 open_accounts_callback=lambda: self.open_accounts_tab(),
                 open_settings_callback=lambda: self.open_settings_tab(),
             )
-        if title == "④ 账号管理":
+        if title == "账号管理":
             return AccountsTab(
                 db_path=self.db_path,
                 config=self.config,
                 status_callback=self.show_status,
             )
-        if title == "⑤ 设置":
+        if title == "设置":
             return SettingsTab(
                 config=self.config,
                 config_path=self.config_path,
                 ai_models_path=self.ai_models_path,
                 status_callback=self.show_status,
             )
-        if title == "⑥ 商品套图":
+        if title == "商品套图":
             return ProductSuiteTab(
                 db_path=self.db_path,
                 config=self.config,
@@ -209,7 +208,7 @@ class MainWindow(QMainWindow):
             return True
         box = QMessageBox(self)
         box.setWindowTitle("未保存更改")
-        box.setText("⑤ 设置有未保存更改。要先保存再离开吗？")
+        box.setText("设置有未保存更改。要先保存再离开吗？")
         save_button = box.addButton("保存", QMessageBox.AcceptRole)
         discard_button = box.addButton("放弃", QMessageBox.DestructiveRole)
         box.addButton("取消", QMessageBox.RejectRole)
@@ -229,7 +228,7 @@ class MainWindow(QMainWindow):
         event.ignore()
 
     def open_accounts_tab(self):
-        self.tabs.setCurrentIndex(TAB_TITLES.index("④ 账号管理"))
+        self.tabs.setCurrentIndex(TAB_TITLES.index("账号管理"))
 
     def open_settings_tab(self):
-        self.tabs.setCurrentIndex(TAB_TITLES.index("⑤ 设置"))
+        self.tabs.setCurrentIndex(TAB_TITLES.index("设置"))